Developer's DescriptionBy Performance ElectronicsTCI EZ-TCU Transmission Controller users can now tune their transmission via iOS and Android devices.TCI EZ-TCU Transmission Controller users can now tune their transmission via iOS and Android devices. A wireless module enables Bluetooth communication between the EZ-TCU and an iOS and Android app, enabling the user to control shift points, firmness and aggressiveness. Data logging and self-diagnostics make it possible to optimize tuning intuitively without the need for software, a hand-held unit or cabling. There is also an anti-theft feature that allows for remote disabling of the vehicle.Features & Benefits: Easy transmission control from your phone or tablet; no laptop or software needed Maximum electronic control over the shift points, shift firmness and shift aggressiveness Data logging and self-diagnostics for optimal tuning Anti-theft feature for disabling vehicle through app Compatible with 4L60E, 4L65E, 4L70E, 4L80E, 4L85E and TCI 4x & 6x transmissions Available for iOS and Android